The *“Minimal staking to cover cost”* calculator will help you to determine the minimal of NAV Coin you need to make a profit from staking. Staking will give you an annual return of 4**%** on the total amount of NAV Coin you stake.

The **NavPi **uses roughly *18kWh* of power annually to run 24/7. To setup a NavPi you will need a Raspberry Pi 3, memory card and a power supply. This will cost around *$80* depending on your location.

- Annual Electricity costs (USD): This number represents the total electricity cost for running your staking device over a one year period.
- Minimal staking reward to cover electricity cost: This is the amount of NAV Coin you need, to cover the electricity costs made by running your device for staking.
- Minimal amount of NAV Coin to cover electricity cost with staking:

This is the total amount of NAV Coin you need to have for staking, to cover electricity costs over a one year period. With this amount of NAV Coin staking you will exactly cover your electricity costs. - Minimal amount of NAV Coin to cover cost (including initial investment): This is the total amount of NAV Coin you need to have for staking to cover all costs over a one year period. With this amount of NAV Coin staking you will cover your electricity costs and your initial investment.

Initial investment: Did you buy a Raspberry Pi or a NavPi from the development team? Buying equipment for staking is an initial cost to get started. This calculator will show you how much NAV Coin you need to cover those costs in a one year period.

Annual energy usage: The annual energy usage of your device can be calculated by:

(Power use (Watts) * Hours used per day * 365)/1000. The number is divided by a 1000 because of the

kiloWh.

For example:

A Macbook Pro uses about 60 Watts when charging and 20 Watts on the battery. For the example we will take 60 Watts and the Macbook turned on 24/7 all year. So: (60 * 24 * 365)/1000 =

525.6kWh.